Well I'm actually here now trying to install Synapse but I have a problem.

In the bottom right hand corner Synapse says it recognizes my Deathadder, so I open synapse up, but then it says "Please connect a Synapse enabled device." Then a pop-up comes up and says if I choose to update the framework, Deathadder configurator and Converter. I click to update, then it does the first of three steps. Then I get an error say DAConverter has stopped working. Then it magically says update 100% complete. And the same update pop-up comes up again. Nothing happens.

This time I installed synapse using the link you provided, it did some things different for the installment. But, in the end, I still have the same problem.

Wow, what I did was I plugged mine in (without any drivers or anything) and Windows recognized it and before I downloaded the driver almost everything worked. All the buttons worked except the DPI and the two right side buttons. Then I went and downloaded the driver from the link I provided, it took a few minutes to finish downloading and after that it asked to finish setup. I clicked OK, when that was done the Razer configuration panel came up and I set all the settings to my liking.

What I would say is to uninstall Synapse and just plug your Deathadder in and see if windows (I'm assuming your on Windows?) recognizes it. Then try downloading Synapse again. Now I have a different mouse and it might be different.